<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>5_对象相关知识</title>
</head>
<body>
    <script type="text/javascript">
        let a = 'name'
        let obj = {} // {name: 'tom'}
        // obj.name = 'tom'
        // console.info(obj)

        obj[a]  = 'jetty'
        console.info(obj)
    </script>
</body>
</html>